THORLABS S1FC635PM User manual

S1FC635PM, S1FC780PM,
S1FC1310PM, S1FC1550PM
Fiber-Coupled Laser Source
User Guide

Fiber-Coupled Laser Source
Table of Contents
Chapter 1 Warning Symbol Definitions.............................................................................................. 1
Chapter 2 Safety .................................................................................................................................... 2
Chapter 3 Description........................................................................................................................... 3
Chapter 4 Setup ..................................................................................................................................... 4
4.1. Setting the AC Line Voltage and Installing Fuses........................................................4
4.2. Initial Set-up.....................................................................................................................4
Chapter 5 Operation.............................................................................................................................. 6
5.1. Front and Back Panel Overview.....................................................................................6
5.2. Turning on the Source....................................................................................................7
5.3. Adjusting the Laser Output Power ................................................................................7
5.4. Turning the Laser Off......................................................................................................7
5.5. Modulating the Laser Output .........................................................................................7
Chapter 6 Making the Safety Interlock Connection.......................................................................... 8
Chapter 7 General Maintenance.......................................................................................................... 9
7.1. Cleaning...........................................................................................................................9
7.2. Connector Cleaning........................................................................................................9
Chapter 8 Specifications .....................................................................................................................10
Chapter 9 Mechanical Drawing...........................................................................................................11
Chapter 10 Regulatory...........................................................................................................................12
Chapter 11 Certificate of Compliance..................................................................................................13
Chapter 12 Thorlabs Worldwide Contacts..........................................................................................14

Fiber-Coupled Laser Source Chapter 1: Warning Symbol Definitions
Rev E, February 21, 2017 Page 1
Chapter 1 Warning Symbol Definitions
Below is a list of warning symbols you may encounter in this manual or on your device.
Symbol
Description
Direct Current
Alternating Current
Both Direct and Alternating Current
Earth Ground Terminal
Protective Conductor Terminal
Frame or Chassis Terminal
Equipotentiality
On (Supply)
Off (Supply)
In Position of a Bi-Stable Push Control
Out Position of a Bi-Stable Push Control
Caution: Risk of Electric Shock
Caution: Hot Surface
Caution: Risk of Danger
Warning: Laser Radiation
Caution: Spinning Blades May Cause Harm

Fiber-Coupled Laser Source Chapter 2: Safety
Page 2 18651-D02
Chapter 2 Safety
All statements regarding safety of operation and technical data in this instruction manual will only apply when the
unit is operated correctly.
SHOCK WARNING
High voltage inside. To avoid electrical shock, before powering unit, make sure that the protective
conductor of the 3-conductor power cord is correctly connected to the protective earth contact of the
socket outlet. Improper grounding can cause electric shock resulting in severe injury or even death.
Do not operate without cover installed
WARNING
This unit must not be operated in explosive environments.
Thorlabs provides the proper power input cable for use in the United States. If using this unit anywhere else, the
user will need to supply a properly grounded power cable to power the unit.
Do not obstruct the air-ventilation slots in the housing!
Make sure that the line voltage rating marked on the rear panel agrees with your local supply and that the
appropriate fuses are installed. Changing of the mains fuse can be done by the user (see Setting the AC Line
Voltage and Installing Fuses).
With the exception of the mains fuses, there are no user serviceable parts in this product.
This device can only be returned when packed into the complete original packaging, including all foam packing
inserts. If necessary, ask for a replacement package.
Mobile telephones, cellular phones or other radio transmitters should not to be used within the range of three
meters of this unit since the electromagnetic field intensity may exceed the maximum allowed disturbance values
according to EN50082-1.
Class 1 Laser Product
1550 nm <5 mW
LASER RADIATION
AVOID DIRECT EYE EXPOSURE
CLASS 3R LASER PRODUCT
600 - 700 nm <5 mW
LASER RADIATION
AVOID EXPOSURE TO THE BEAM
CLASS 3B LASER PRODUCT
700 - 800 nm <50 mW
Class 1 Laser Product
1310 nm <5 mW

Fiber-Coupled Laser Source Chapter 3: Description
Rev E, February 21, 2017 Page 3
Chapter 3 Description
The Thorlabs Fiber Coupled Laser Sources provide easy coupling and simple control of laser diode driven fiber
optics. These laser sources are available in two versions, Fabry-Perot and Distributed Feed Back (DFB). The
Fabry-Perot version comes in 10 (four for the PM version) wavelength choices from 405 to 1550 nm (635 nm to
1550 nm for PM versions) with standard single mode fiber or polarization maintaining fiber output. The S1FCxPM
Series comes with a pigtailed Fabry-Perot Laser diode with polarization maintaining fiber behind an FC/PC
bulkhead connector with the key aligned to the slow axis. The DFB version comes equipped with a thermo-electric
cooler to stabilize the output wavelength, and a 40 dB optical isolator to eliminate frequency jitter due to back-
reflections. The DFB is available in 1310 nm and 1550 nm wavelengths.

Fiber-Coupled Laser Source Chapter 4: Setup
Page 4 18651-D02
Chapter 4 Setup
4.1. Setting the AC Line Voltage and Installing Fuses
Your S1FC Series Laser Source has been shipped from Thorlabs configured for 115 VAC operation. If you are
planning to operate your unit using a 220/230 VAC input, or need to replace an open fuse, you must perform the
following procedure.
Remove the AC power cord if it is connected to the unit.
Remove the cover of the unit by removing the two 4-40 phillips head screws located on the bottom rear of
the unit and slide the cover off. Refer to Figure 1 on the following page.
Locate the AC Line Select Switch and Fuse Holder. They are located near the AC Input Module towards
the back of the unit. Refer to Figure 1.
Using a flat blade screwdriver turn the Line Select Switch to the appropriate setting to match the AC input
voltage you will be using.
Remove the cover to the fuse holder. You will find the fuse installed in the cover. Remove the existing
fuse and install the appropriate fuse for the line voltage you will be using:
oFor 115 VAC operation use 250 mA
oFor 220/230 VAC operation use 160 mA
oIn all cases use only 5 mm x 20 mm 250 VAC Type T Fuses (IEC 60127-2/III, low breaking
capacity, slow blow)
Reinstall the cover and replace the two 4-40 phillips head screws.
Remove the small cap head screw indicating the previous voltage configuration located on the rear panel,
above the AC input housing. Place the screw in the threaded hole indicating the new AC input
configuration, see Figure 2.
4.2. Initial Set-up
Determine the AC line voltage the unit will be connected to (either 115 VAC or 230 VAC) and set the AC
Line Voltage Selector Switch to the appropriate position and install the proper fuse.
Locate the unit on a dry, level working surface.
Make sure the POWER key switch on the front of the unit is in the OFF position (key perpendicular to
working surface).
Plug the female end of the AC line cord provided into the AC Input Receptacle on the rear of the unit.
Plug the male end into a properly grounded AC socket.
Connect a Fiber Optic cable to the LASER APERTURE on the front panel of the unit.

Fiber-Coupled Laser Source Chapter 4: Setup
Rev E, February 21, 2017 Page 5
Figure 1 Locations of Line Select Switch and Fuse Holder
Line Select Switch
Set to either 110 or 220 V
Fuse Holder
Fuse is installed in the cover

Fiber-Coupled Laser Source Chapter 5: Operation
Page 6 18651-D02
Chapter 5 Operation
5.1. Front and Back Panel Overview
Figure 2 Front and Rear Panels of Laser Source
3½ Digit Display
Laser Output Aperture
FC/PC PM Fiber Optic
Connector
AC Power Cord Connector
Cover Screws (2)
Remove to access
line voltage switch
and fuse
Laser Output
Aperture Cover
Cover should be
installed on FC
connector when
fiber removed
Laser Enable Switch
Press to activate laser
Laser Emission Indicator
Lights up 5 seconds before laser turns
on
Keylock Power Switch
Turn on power to the unit.
Key only removes when off
Power Adjust Knob
Remote Interlock Input
Modulation Input
0 to 5 V Max, 50 Ω
Voltage Type Cap Screw Indicator

Fiber-Coupled Laser Source Chapter 5: Operation
Rev E, February 21, 2017 Page 7
5.2. Turning on the Source
Turn the POWER key switch clockwise. The unit is ON when the display lights up.
Make sure the Interlock Input is short-circuited, see page 10.
Press and release the ENABLE switch to turn ON the laser. The LASER ON indicator will light up and
after a delay of approximately 5 seconds, the source will begin to emit light.
5.3. Adjusting the Laser Output Power
Use the PWR ADJUST knob to adjust the output power to the desired level.
The power shown on the display is the optical power at the laser aperture. The actual power at the end of
your fiber optic cable may be less, depending on the quality of the connection.
Note, each unit is calibrated internally to limit the maximum operating power of the laser diode to a safe operating
range.
5.4. Turning the Laser Off
The Laser output should be turned off by pressing and releasing the ENABLE switch.
When completely powering down an enabled unit, first press and release the ENABLE switch and then
turn the POWER key switch counterclockwise, which will turn OFF the entire unit. Anytime the unit is
turned OFF and then turned back ON, the Laser will be disabled until the ENABLE switch is pressed.
5.5. Modulating the Laser Output
The MOD IN input can be used to modulate the laser output, or set the laser output remotely using a +5 V power
source. The 5 V maximum input corresponds to the maximum calibrated power of the laser source. Each unit is
calibrated to achieve the maximum power for the particular laser diode used in the device. Due to variations in the
coupling process no two units will have the same maximum power.
Connect a signal generator or +5 V power source to the unit using a BNC type connector.
Set the PWR ADJUST knob to its full counter clockwise setting.
Press the ENABLE switch to turn on the laser.
Apply the appropriate signal to the MOD IN input. Signals above approximately 5.5 V will be clamped by
internal circuits.
Adjusting the PWR ADJUST knob will allow for a DC offset on the modulated output. Adjust the input
signal accordingly to avoid clipping the output waveform, which will occur if the unit is driven to its current
or power limits.
Caution!
DO NOT apply TTL or square wave modulation to the MOD IN input.
Due to response delays of the constant power control loop, damage to the integrated fiber coupled
laser may occur!

Fiber-Coupled Laser Source Chapter 6: Making the Safety Interlock Connection
Page 8 18651-D02
Chapter 6 Making the Safety Interlock Connection
The S1 series laser sources are equipped with a remote interlock connector located on the rear panel, see Figure
2. All units have this feature regardless of their FDA and IEC classifications. In order to enable the laser source, a
short circuit must be applied across the terminals of the Remote Interlock connector. In practice this connection is
made available to allow the user to connect a remote actuated switch to the connector (i.e. an open door
indicator). The switch (which must be normally open) has to be closed in order for the unit to be enabled. Once
the switch is in an open state the laser source will automatically shutdown. If the switch returns to a closed
condition the laser source must be re-enabled at the unit by pressing the ENABLE switch.
All units shipped from Thorlabs are configured with a shorting device installed in the Interlock connector. If you
are not going to use this feature then you can leave the shorting device installed and the unit will operate normally
as described in the procedures above.
If you wish to make use of the Interlock feature you will need to acquire the appropriate connector mate and wire
it your remote interlock switch. Next, remove the shorting device by pulling it out with a pair of needle nose pliers
and install the connector into the interlock input.
The interlock input only accepts a 2.5 mm mono phono jack. This connector is readily available at most
electronics stores.
The electrical specifications for the interlock input are shown in the following table.
Specification
Value
Type of Mating Connector
2.5 mm Mono Phono Jack
Open Circuit Voltage
+5 VDC with Respect to Chassis Ground
Short Circuit Current
0.5 mA DC
Connector Polarity
Tip is +5 V, Barrel is Ground
Interlock Switch Requirements
Must be N.O. Dry Contacts
Under no circumstances should any external
voltages be applied to the Interlock input
Figure 3 Remote Interlock Connector
Ground
+5 Volts

Fiber-Coupled Laser Source Chapter 7: General Maintenance
Rev E, February 21, 2017 Page 9
Chapter 7 General Maintenance
Aside from the AC Input fuse there are no user serviceable parts in this product. If you suspect something has
failed on the unit, please contact Thorlabs for advice on returning the unit for evaluation.
7.1. Cleaning
The unit can be cleaned using a soft, slightly damp cloth. Avoid using any solvents on or near the unit.
7.2. Connector Cleaning
Always clean the ferrule end of your fiber patch cable prior to inserting it into the output FC Adapter. Your
benchtop source comes with a fiber-cleaning card (FCC-CLN2-1). This should be used before inserting the fiber
connector into the mating barrel.
Figure 4 Fiber Cleaning Card (FCC-CLN2-1)
To use the card, peel back and tear away one small blue strip. Holding the connect firmly, swipe the connector tip
across the exposed cleaning strip. The connector tip should be flush to the card surface for FC-PC connectors
and at a slight angle with the key straight up for FC-APC connectors.

Fiber-Coupled Laser Source Chapter 8: Specifications
Page 10 18651-D02
Chapter 8 Specifications
Item #
S1FC635PM
S1FC780PM
S1FC1310PM
S1FC1550PM
Wavelength
635 nm
785 nm
1310 nm
1550 nm
Min Full Output Power
2.5 mW
6.25 mW
1.5 mW
1.5 mW
Stability
15 min: ±0.05 dB, 24 hr: ±0.1 dB
(After 1 hr Warm-up at 25 ± 10 °C Ambient)
Display Accuracy
±10%
Setpoint Resolution
0.01 mW
Adjustment Range
~0 mW to Full Power
Fiber Alignment
Slow Axis Aligned to the Key
TEC
Stability
n/a
Setpoint Accuracy
n/a
Setpoint Resolution
n/a
Adjustment Range
n/a
Environmental
Operating Temperature
15 to 35 °C
Storage Temperature
0 to 50 °C
AC Input
115 VAC / 230 VAC (Switch Selectable) 50 - 60 Hz
Modulation Input
0 - 5 V = 0 - Full Power, DC or Sine Wave Input Only
Modulation Bandwidth
5 kHz Full Depth of Modulation
30 kHz Small Signal Modulation
Fiber
PM630-HP
PM780-HP
PM1300-HP
PM1550-HP

Fiber-Coupled Laser Source Chapter 9: Mechanical Drawing
Rev E, February 21, 2017 Page 11
Chapter 9 Mechanical Drawing

Fiber-Coupled Laser Source Chapter 10: Regulatory
Page 12 18651-D02
Chapter 10 Regulatory
As required by the WEEE (Waste Electrical and Electronic Equipment Directive) of the European Community and
the corresponding national laws, Thorlabs offers all end users in the EC the possibility to return “end of life” units
without incurring disposal charges.
This offer is valid for Thorlabs electrical and electronic equipment:
Sold after August 13, 2005
Marked correspondingly with the crossed out “wheelie bin” logo (see right)
Sold to a company or institute within the EC
Currently owned by a company or institute within the EC
Still complete, not disassembled and not contaminated
As the WEEE directive applies to self-contained operational electrical and electronic products, this end of life take
back service does not refer to other Thorlabs products, such as:
Pure OEM products, that means assemblies to be built into a unit by the user (e. g. OEM laser driver
cards)
Components
Mechanics and optics
Left over parts of units disassembled by the user (PCB’s, housings etc.).
If you wish to return a Thorlabs unit for waste recovery, please contact Thorlabs or your nearest dealer for further
information.
Waste Treatment is Your Own Responsibility
If you do not return an “end of life” unit to Thorlabs, you must hand it to a company specialized in waste recovery.
Do not dispose of the unit in a litter bin or at a public waste disposal site.
Ecological Background
It is well known that WEEE pollutes the environment by releasing toxic products during decomposition. The aim of
the European RoHS directive is to reduce the content of toxic substances in electronic products in the future.
The intent of the WEEE directive is to enforce the recycling of WEEE. A controlled recycling of end of life products
will thereby avoid negative impacts on the environment.
Wheelie Bin Logo

Fiber-Coupled Laser Source Chapter 11: Certificate of Compliance
Rev E, February 21, 2017 Page 13
Chapter 11 Certificate of Compliance
FCC EMC Compliance
Emissions comply with the Class A Limits of FCC Code of Federal Regulations 47, Part 15, Subpart B
1
1
Using high-quality shielded interface cables.

Fiber-Coupled Laser Source Chapter 12: Thorlabs Worldwide Contacts
Page 14 18651-D02
Chapter 12 Thorlabs Worldwide Contacts
For technical support or sales inquiries, please visit us at www.thorlabs.com/contact for our most up-to-
date contact information.
USA, Canada, and South America
Thorlabs, Inc.
s[email protected]
[e-mail]
Europe
Thorlabs GmbH
[email protected]
France
Thorlabs SAS
[email protected]
Japan
Thorlabs Japan, Inc.
[email protected]
UK and Ireland
Thorlabs Ltd.
[email protected]
[e-mail]
Scandinavia
Thorlabs Sweden AB
[email protected]
Brazil
Thorlabs Vendas de Fotônicos Ltda.
[email protected]
China
Thorlabs China
[email protected]

www.thorlabs.com